RETRACTED — Monomode optical planar and channel waveguides in Yb3+- doped silicate glasses formed by helium ion implantation

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalplicy).The Publisher hereby confirms that the retraction of this article was in no way due to any wrong-doing by the authors. On the contrary, the authors were the victims of a third party who invalidated the editorial process of this article by faking reviewer reports.